Upgrading firmware from .83 to .92

I am running the .83 version of the Repetier firmware and would like to upgrade to .92 so I can use an LCD controller. I have looked at the Configuration Tool for .92 but there are a lot of questions/settings that I can not answer as I have not run into those settings before.

Would I be correct in that I fill in the settings that I can fine in version .83 and leave the rest as defaults?

The printer is running so well that I am hesitant to upgrade but really want to use the LCD controller so that I do not have to tie up a computer for printing.